The main raw materials are talc, clay, alumina, feldspar and so on. Manufactured with general ceramic technology. The sintering range is narrow, the sintering temperature and the cordierite decomposition temperature are only a few degrees, and the dense body is difficult to obtain. Often used green mud stone, magnesium carbonate, barium carbonate, zirconium silicate, zirconia, boron trioxide, lithium, such as a compound as an additive, can reduce sintering temperature, expand the firing temperature range, and improve its dielectric properties. Can be used as a coil skeleton, arc-resistant electrical insulating material, composite materials, electric insulation device burner nozzle material.